Trolley mechanism.



L. R. BARKER & B, 0. DIETRIOH.

TROLLEY MECHANISM.

APPLICATION FILED 11116.19, 1912.

Patented Jan. 21, 1913.

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'5 TROLLEY MECHANISM.

Specification of Letters latent. Patented Jain. 21, i913;

Application filed August 19, 1912. Seriai re. M 147.

"To all whom it may concern:

Be itknown that we, LEWIS R. BARKER and EDWARD O. Dm'rmon, citizens of the United States, residing at Riverton, in the county of Cherokee and State of Kansas, have invented a certain newand useful Improvement in Trolley Mechanism, of which the following is a specification.

' Our invention relates to improvements in trolley mechanisms.

The object of our invention is to provide a novel trolley mechanism which is adapted for use on traveling cranes or other machines which, in operation, are so close to the trolley wire as to require a short trolley pole.

Our invention provides a trolley mechanism having a trolley pole which is adapted wardly, means being provided .for permit to travel in either direction on the trolley wire and which upon encountering. an obstruction may swing forwardly or backtrolley pole support.

' Inthe accompanying drawings which illustrate our invention in its preferred form, Figure 1, is a side elevation of the mechanism, showing the trolley Wheel engaged with the trolley wire. Fig. 2 is a -plan view of the-trolley mechanism. Fig. 3

1 designates a, supporting base, preferably I a Off 1 Wood, slate: or. other insulating v naterial v u n hi h -a ounted two bearings 2 and is a vertical section on the line (1-?) of Fig. 1. Similar. characters of referencedesignate similar parts inthe different views '31 in-which is, pivoted a horizontal rock bar 4; which serves as a support for the trolley Qpole. Preferablyqthetrolley pole .is longitudinally; extensible and comprises the following descr-ibecl parts:f'llhe lower member. 5 zis preferably bifurcated atits lower end, the

arms thereof being pivoted by a transverse horizontal pin 6 to the rock bar 4. The

upper member 7 is provided cylindrical lower end longitudinally-:slidalily fitted in the tubular upper end. of therlower member 5, the last named memberihaving in the tubular portion two. oppositely disposed vertical slots in which is securedv a key 8 which extends through a vertical slot 9'prov1ded 1n the member-7,]the keyservmg to limit the outward or upward movei ment of the member'Z. Longitudinallyadjustable on the tubular-part of the member 5 is a collar 10 having asetscrew 11 which secures the collar in the position to which it may be adjusted. Aeoiljspring12.;en-

circles the member 5, and: has itslower end resting against the collar; 10,..its npper end having a bearing againstacollarli, which,

encircles the shank'of thev member 7 land bears against the enlargedbifnrcatedend of the member 7. Between the arms of the bipivotedfin the usual niannerhan ordinary trolley wheel 14 adaptedjogrun against a trolley wire 15. .QQ,

For normally forcing the trolleyi oleto a vertical position relative ,110 vertic l,

planeof the wire 15, twolcoilsprifngs' lti,are mounted on the base 1 and respectivel bear against the under side ofaiplate l ijwhicli is secured to the rock bar the, springs being disposed at opposite sides of the rock bar t, as. shown in dotted ,lines r,in r lfig.,2.'

These springs pcrmittliei-ock bar, o rock so as in pfiiillt the trolleyjpolejto swing laterally in following the ,troll'ey wire 15. To normally force the trolley pole to avertical or medial position after it has}. been swung forwardly or backwardly" axis by reason of the trolleywheel strikingan obstruction, we provide-yieldii ig neii t fifcomprising, preferably, a normally horizontal .bar. or lever 18 which is pivoted by a hori- 7jontal pin 19 tothe bifurcated, upper end of an upwardly extending arm 20 witli. which one end of the bar t is provided. flhe upper side of the bar or lever 18 is provided with converging cam faces 21 adapted ttojb'ear' against a roller 22 with which the'ftro lley pole is provided and which is rotatively mounted on a horizontal. pin. 23' secured in theannis of the member 5, the roller being located between said arms.

A spring is mounted between the bar or lever 18 and the rock bar 4 for normally swinging the bar orlever 18 so that it'will have; its cam faces 21 forced upwardly against the roller 22. Preferably this spring is a flat spring 24; which bears against the bar 4: and against the underside of the bar 18 between. the arm 20 and the cam faces 21.- -A vertical bolt 25 extends through the bar 18 at the opposite side of the arm 20 and through the spring 24, which at this point curves away from the bar 18 andrests upon'the head of the bolt 25. The upper end of the bolt has a nut 26 mounted thereon which bears against'the upper side of the bar 18. By adjusting the nut the tension of the spring 24 may be varied, as will be readily understood, i

In operating our invention the trolley pole is normally held vertically so as torun with equal facility in either direction along the trolley wire. In case an obstruction is encountered by the trolley wheel 14, the roller 22 will run along one of the cam faces 21, thereby depressing the bar 18, which, as soon as the obstruction has been passed, will force the trolley pole back to the medial posit-ion due to the pressure exerted upon thebar 18by the spring 24:.

A transverse pin 27 in the bar 18 at the,

right of the right cam face 21, as viewed in Fig. 1 serves to prevent the trolley pole being swung off from the bar 18 if the trolley pole is swung in that direction onits ax1s.

By the employment of a vertical extensible trolley pole, the mechanism'is adapted for use on machines which are very close to .the trolley wire, the trolley wheel. may

. I readily run in either direction on the trolley wire, and the trolleypole .will not extend forwardly or backwardly beyond the ma-' oted to swing on a horizontal axis, and yielding means including a member pivottd on a horizontal axis to said support and hav-' ing two converging cam faces for engaging the trolley pole for swinging the trolley pole on its axis to a vertical position.-

I '2. In a trolley mechanism, a trolley pole, a support having pivoted to it on a horizontal axis said trolley pole, means for plvotally supporting said support so that it may rock on an axis disposed horizontally at right angles to the axis of the trolley wardly from a medial position, a member pivoted to said support and engaging said trolley pole, and means for normally forcing said member to a position in which'it will yieldingly hold the trolley pole in the medial posit-ion.

at. In a trolley mechanism, a laterally rocking support, a trolley pole pivoted thereto to swing forwardly and backwardly,-

a member pivoted to thesupport and having means for engaging said trolley pole for swinging the trolley pole to a medial position, and a spring for yieldingly holding the said member engaged with the trolley pole.

5. In a trolley mechanism, a laterally rocking support, a trolley pole pivoted.

thereto to swing forwardly and backwardly from a medial position, means for normally forcing the support to rock to a position in which the axis of'the trolley pole will be horizontal, a member pivoted to the sup-.

port and having two converging cam faces for engaging the trolley pole to normally force it to the medial position, and a spring for yieldingly forcing the said member into engagement with the trolley pole.

6. In a trolley .mechanism, a laterally rocking support, a trolley pole pivoted thereto so as to swing forwardly and backwardly from a medial position, spring actuated means for normally forcing the support 'to swing to a position in which the pivotal axis of the trolley pole will be disposed horizontally, a member pivoted to the said support and having means for engaging with and swinging the trolley poleto said medial position, and a spring foryieldingly forcing said member into engagement with the trolley pole.

7. In a trolley mechanism, a laterally rocking support, a trolley pole pivoted thereto, means for normally rocking the support to a position in which the pivotal axis of the pole will be disposed horizontally, a member pivoted to said support and having two converging cam faces for engaging the trolley pole for swinging it a medial position, and a spring for forcmg said member to a position in which the memher will hold the trolley pole in the medial position.

8. In a trolley mechanism, a laterally rocking support, 4 a trolley pole pivoted thereto, two springs disposed so as to nor- -mally rock the support to a position in which the pivotal axis of the trolley pole will be horizontal, a member pivoted to the supportto swing vertically and having on one side two converging cam faces which engage the trolley pole and normally force it to a medial positi0n,' and a spring for yieldingly holding the said member engaged with the trolley pole.

In testimony whereof we have signed our names to this specification in presence of two subscriblng witnesses.

LEWIS R. BARKER.

EDWARD G. DIETRICH.

Witnesses:

SAMUEL E. GARD, FRANK E. M RSHA L. 

